<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
<style>
    div{
        width:50px;
        height:50px;
        margin:auto;
        border-radius: 50%;
    }
    .d1{
        background-color: #f6f6f6;
        box-shadow: -8px -8px 10px #4c4c4c
    }    
</style>
</head>
<body>
    <div class="d1"></div>
</body>
</html>